/*
 * Sonatype Nexus (TM) Open Source Version
 * Copyright (c) 2008-present Sonatype, Inc.
 * All rights reserved. Includes the third-party code listed at http://links.sonatype.com/products/nexus/oss/attributions.
 *
 * This program and the accompanying materials are made available under the terms of the Eclipse Public License Version 1.0,
 * which accompanies this distribution and is available at http://www.eclipse.org/legal/epl-v10.html.
 *
 * Sonatype Nexus (TM) Professional Version is available from Sonatype, Inc. "Sonatype" and "Sonatype Nexus" are trademarks
 * of Sonatype, Inc. Apache Maven is a trademark of the Apache Software Foundation. M2eclipse is a trademark of the
 * Eclipse Foundation. All other trademarks are the property of their respective owners.
 */
package org.sonatype.nexus.internal.status;

import javax.inject.Inject;
import javax.inject.Named;
import javax.inject.Singleton;

import org.sonatype.nexus.orient.freeze.DatabaseFreezeService;
import org.sonatype.nexus.orient.freeze.ReadOnlyState;

import static java.lang.String.format;

/**
 * Health check that indicates if the database is currently frozen
 *
 * @since 3.16
 */
@Named("Database Frozen")
@Singleton
public class DatabaseHealthCheck
    extends HealthCheckComponentSupport
{
  private final DatabaseFreezeService databaseFreezeService;

  @Inject
  public DatabaseHealthCheck(final DatabaseFreezeService databaseFreezeService) {
    this.databaseFreezeService = databaseFreezeService;
  }

  @Override
  protected Result check() {
    ReadOnlyState state = databaseFreezeService.getReadOnlyState();
    return !state.isFrozen() ? Result.healthy() : Result.unhealthy(reason(state));

  }

  private static String reason(final ReadOnlyState state) {
    return format("Frozen: %s, System Initiated: %s, Summary Reason: %s", state.isFrozen(), state.isSystemInitiated(),
        state.getSummaryReason());
  }

}
